278178481151 has 4 divisors (see below), whose sum is σ = 287770842600. Its totient is φ = 268586119704.

The previous prime is 278178481033. The next prime is 278178481153. The reversal of 278178481151 is 151184871872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278178481151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 278178481093 and 278178481102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278178481153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4796180681 + ... + 4796180738.

It is an arithmetic number, because the mean of its divisors is an integer number (71942710650).

Almost surely, 2^278178481151 is an apocalyptic number.

278178481151 is a deficient number, since it is larger than the sum of its proper divisors (9592361449).

278178481151 is an equidigital number, since it uses as much as digits as its factorization.

278178481151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9592361448.

The product of its digits is 1003520, while the sum is 53.

The spelling of 278178481151 in words is "two hundred seventy-eight billion, one hundred seventy-eight million, four hundred eighty-one thousand, one hundred fifty-one".